import net.ipip.ipdb.City;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.lang.reflect.Array;
import java.net.URL;
import java.text.SimpleDateFormat;
import java.util.*;


/**
 * invoke: @class@method(args)
 * <p>
 * sample:
 * <pre>
 * 	&lt;if test="@Ognl@isNotEmpty(userId)">
 * 		and user_id = #{userId}
 * 	&lt;/if>
 * </pre>
 */
public class Ognl {

    /**
     * used to judge if empty for String,Map,Collection,Array
     *
     * @param o
     * @return
     */
    @SuppressWarnings("rawtypes")
    public static boolean isEmpty(Object o) throws IllegalArgumentException {
        if (o == null) return true;

        if (o instanceof String) {
            if (((String) o).length() == 0) {
                return true;
            }
        } else if (o instanceof Collection) {
            if (((Collection) o).isEmpty()) {
                return true;
            }
        } else if (o.getClass().isArray()) {
            if (Array.getLength(o) == 0) {
                return true;
            }
        } else if (o instanceof Map) {
            if (((Map) o).isEmpty()) {
                return true;
            }
        } else {
            return false;
//			throw new IllegalArgumentException("Illegal argument type,must be : Map,Collection,Array,String. but was:"+o.getClass());

        }

        return false;
    }

    /**
     * @param
     * @return
     */
    public static boolean isNotEmpty(Object o) {
        return !isEmpty(o);
    }

    public static boolean isNotBlank(Object o) {
        return !isBlank(o);
    }

    public static boolean isNumber(Object o) {
        if (o == null) return false;
        if (o instanceof Number) {
            return true;
        }
        if (o instanceof String) {
            String str = (String) o;
            if (str.length() == 0) return false;
            if (str.trim().length() == 0) return false;

            try {
                Double.parseDouble(str);
                return true;
            } catch (NumberFormatException e) {
                return false;
            }
        }
        return false;
    }

    public static boolean isBlank(Object o) {
        if (o == null)
            return true;
        if (o instanceof String) {
            String str = (String) o;
            return isBlank(str);
        }
        return false;
    }

    public static boolean isBlank(String str) {
        if (str == null || str.length() == 0) {
            return true;
        }

        for (int i = 0; i < str.length(); i++) {
            if (!Character.isWhitespace(str.charAt(i))) {
                return false;
            }
        }
        return true;
    }




}
